RAT SNAKE: We often see this Mexican Rat Snake—or his relatives—around CSA. He used to be conspecific with Great Plains Rat Snake, but recently was given full species status. He’s a handsome, harmless fellow who helps out with rodent control. Interestingly, there are virtually no rattlesnakes in the lower Valley; there has never been a confirmed rattlesnake at Santa Ana NWR, nor are there any Water Moccasins or Copperheads. We do have Texas Coral snakes, but they are very uncommon, sluggish, and small-mouthed. You have to work pretty hard to get one to bite, nonetheless, some idiot succeeds every once in a long while.